Automatic pittsburgh lock seam sealer



Se t. 2, 1952 I M. TROOP AUTOMATIC PITTSBURGH LOCK SEAM SEALER 2 SHEETS-SHEET 1 Filed Sept. 20, 1948 r M m w I Martin Trbop B) WWW 3% 2, 1952 TRoo 2,609,028

AUTOMATIC PITTSBURGH LOCK SEAM SEALER Filed Sept. 20, 1948 2 SI-lEETS-SHEET 2 1 Fig. 3.

I III/All II Inventor M I M arfin Troop Patented Sept. 2, 1952 1 PATENT AUTOMATIC. 111

Mar tin:Tioon Bayonne, N732, assighor'bf one half to'Edward 'Griffin, Baynne, N. J

'hiiplie'atiofseptiiiber 20, 1948, SeriaTNo. 50,225

6 Claims. (015153- 11) invention relates to "new and useful fin provements in devices for "turning'inwarely "the normally standing edge of a "Pittsburgh lock seam andth'e primary tweet-of the present invention is to provide a machine "for receiving and turning "inwardly the standing ed'g'edf a Pittsburgh seam'and embodying-novel and lin proved-"means for tapping anti sealing the stand-- ing edge after the same has been *turn'ecl 1n= 'wa'rclly, I H

Another importantobject or the present inventien is to prcvi-de a Pitt burgh leek seam sealing toolincludinga die tor turning the standing edge'of said seam inwardly 'and areeiproeat *ing hammer that wills'ealthe sai edge after the-same: has been turned. inwardly, "the harhrner following-theme so thatthe sai'ii edge'wm be sealedtl'iroughollt itslehgth. I Yet another object 01 the present invennbn is-to rovide a Pittsburgh leek seam sealer 'ineluding a'h'o'us'ihg, a die carnea y tn housing for turning "the standing edge "of aPittshflh 'lock-seam and having a bearing surface where= "by the housing "will he overbaiancea at its for ward portion so 't hat'es -areeiprocatingrmember 'earriedby'the housi'ng'is actuated th'els'aidhousmg and -die'will move rrorwa'rdiy "to eliminate the "necessityof aneperatorhavmg to ror-ce the "housing forwardly;

A further tweet-6i the present inve tion is l "to provide :a Pittsburgh lok seam sealer that isrextremely smallandeompaetin structure and which embedies its const uction a group or elements that are quietly and readily assembled or disassembled in a convenient manner.

A still "further aim of the present invention is to provide :a device of the aforementioned character that is simple and practical in con s'truction, .strong and reliable in use, eat a and attractivein appearance, 'flicient and durablein operation, relatively inexpensive to manufacture, and otherwise well adapted for theflpurposes-for which the same-is intended. v y

"ther objects and advantages reside in the details of construction arid operation as more fully hereinafter described and claimed; refer ence being had to the accompanying drawings formingpart hereof, wherein like. numerals refer to like parts throughout, and in whichi Figure :1, is :a. perspective view of :the present invention, and showing tthezsa-ii'ie in" use;

p i "Figure 21s a rurther'perspective view of the present .:invention illustrating the entranee ffif themdie; i a -Fie11 e8 =is:a tow lanavzlewermeapresenmm (metal generally including a pair of adj 2 vehtion, and showing the closure plate "and die removed therefrom; Figure 4 "is a longitudinal Vertical "e tifor ifal view 'of the present invention taken substantially on the pla e or section line 4-4 of "Figure 3';

'Fi'gur'et is an "enlarged vertical sectionalvietv taken'sub'stantially on the plane-of'sectionline 5 5 of Figures;

'g'ure fii's an enlargeiivertical seeub raw ew taken substantially on the planeof sectionl'ii'i 6- 6 of Figure 'Zyar'id Figure '7 is a fragmentary perspective new at o'hefend of the present invention. 7 A p 1 Referring now'to the drawings in detail; were: in forthe'purpose of 'illustration there is his? 'elosd. a preferred embodiment or the "present invention, the numeral 'lfl repre'sents a substah ti'all'y rectan mar conduit section df lbe hda'l "t wens I2 and [4 that are joined by a Pitts b H seam 15in o'rdento form and retain the conduit m n itsintended shape. a i'Ih wan I4 is provided with a filwarmy; tending longitudinal enamel l 6 adj ac ht its free longitudinal edge l8 that receives the ahgiilatii or beat mgaudmai edge '20 or the wan menu the edge l 8 extends well outwardly fr'oii'ijthje iiti "surface of the wall l2, as shb'wh'he'st iiiiFigiire 1 Of the drawings.

The present invention does "not attempts claimthe above and wen eo'iivffitihhal structure, but is nierly a device that is user in conjunction therewith rdr turhii'ig ill sealing the normally standing edge [8 against the outer surfaceof the wall [4 and for forcingith edge 20 tightly into the channel Iii.

Heretof ore many toolshave beeniempmyeagiat turning the edgezfiinwardly; however, a further operation and frequently two operations. were necessary in order to seal the edge 18 agaihst the wall 12 and the edge -28 in thechannel :Hi; It is therefore the principal feature of thisin vfehtion toprovide a tool for simultaneously 'a'coomplishing the above results;

To carry out the'inten'de'ii .purposes "of the prsentinvention, there isproVicleahollOW, suli stantially rectangular housing or slide -'2-2""of preferably metallic*construction'that is open at oneside and at one'ehd; The fireesed'ge'sof the walls forming the housingare turned outwardly to provide a retaining flange having spaced apertures 26.

A cover plate or closure itihears' against-the receive suitable fasteners 38 for detachably securing the closure 28 to the housing 22 for closing the open side thereof.

A substantially triangular die or block 32 is suitably fixed to the outer surface of the closure 28 adjacent the open end of the housing 22. One edge 34 of the die 32 is substantially flush with one transverse edge of the closure 28, and one edge 36 of the die 32 is spaced parallel to one longitudinal edge of the closure 28 so that the remaining edge 38 of the die 32 will form a bearing surface that is inclined relative to the iongitudina1 axis of the housing 22 for a purpose which will later be more fully apparent.

A guide slot 48 is provided in the die 32 and extends from the edge 36 to the edge 38 along a smooth curve to provide a substantially vertical entrance slot 42 and'a substantially horizontal exit slot 44 so that as the edge I8 is fed through the slot 48 from the entrance 42 thereto, the edge I8 will be folded or turned inwardly against the outer surface of the wall I2. It being understood that the edge 36 of the die 32 will bear against the outer surface of the wall I2 and the greater portion of housing 22 will be disposed forwardly of the die since the housing 22 will be supported relative to the conduit I8 by the edge 38 of the die, and the outer surface of the closure 28 will bear against the outer surface of wall I4.

A collar 46 embraces the housing 22 at the open end thereof and is suitably secured thereto. The collar 46 is integrally formed with an apertured plate 48 to which there is detachably secured a further plate 58 having a central opening that registers with the aperture in plate 48 and of a diameter less than the diameter of the aperture in plate 50 so that the enlarged head portion 52 of a hammer body 54 will extend through the opening in the plate 48 and bear against the inner surface of the plate 50.

A substantially channel shaped guide 56 is slidably mounted in the housing 22 and the web portion thereof supports a stem 58 having a portion 60 extending from the web portion of the guide 56 and anchored to a plate 62 that is fixed in the housing 22.

A resilient member 64 is interposed between the plate 62 and the web portion of the guide 56 to normally urge the guide from'the plate 62.

I Removably secured to the inner surface of the plate 48, is an elongated hammer element or striking member 66 having an inclined surface 68.

' disposed forwardly of the die and hammer body 54, as the plunger 18 is reciprocated, the housing 22 and its associated parts will move forwardly. When the die has passed over the forward end of the edge I8, the hammer member 66 will strike and seal the forward end of the edge I8 thus sealing the edge I8 through its length;

It should be noted, that as the edge I8 is hammered by the member 66 the edge 20 will also be driven into the channel I6.

In view of the foregoing description taken in conjunction with the accompanying drawings it 75 is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A Pittsburgh lock seam sealer comprising a slide, a die fixed to the slide and having an opening therein for receiving and turning the standing edge of a. Pittsburgh seam during movement of the slide, and a reciprocating hammer slidably carried by said slide and trailing said die, said hammer being movable with said slide and movable relative to said die to hammer the upstanding edge of a Pittsburgh seam after the same has been turned.

2. An automatic Pittsburgh lock seam sealer comprising an elongated housing having upper and lower portions, means carried by the upper portion of said housing for supporting the housing upon a Pittsburgh lock seam and for turning the standing edge of a Pittsburgh lock seam during movement of the housing, said means including a flat bearing face inclined relative to the longitudinal axis of the housing and located at the upper portion of said housing to retain the lower portion of the housing in advance of the upper portion of the housing to aid in moving the housing relative to a Pittsburgh lock seam, and additional means carried by the upper portion of the housing and trailing said first mentioned means for tapping and sealing the turned edge of a Pittsburgh seam.

3. The combination of claim 1, wherein said additional means includes a reciprocating hammer disposed transversely of said housing, said hammer reciprocating in a path transversely of the housing for aiding the movement of the housing relative to a Pittsburgh seam.

4. A Pittsburgh lock seam sealer comprising an elongated housing having an upper rear portion and a lower forward portion, means mounted on the upper rear portion of said housing for receiving and turning the upstanding edge of a Pittsburgh seam during movement of the housing, said means including a fiat bearing face in clined relative to the longitudinal axis of the housing to overbalance the housing at the lower forward end thereof, and means mounted on the upper rear portion of said housing and trailing said first mentioned means for tapping and sealing the upstanding edge of a Pittsburgh sea'm after the edge has been turned, said last mentioned means including an elongated reciprocating hammer disposed transversely of said housing for aiding the movement of the housing relative to a Pittsburgh seam.

5. A Pittsburgh lock seam sealer comprising an elongated member adaptedto ride against one side wall of a conduit and including an upper end and a. lower end, a means carried by said member for receiving and turning the standing edge of a Pittsburgh seam during movement of the member, said means including a die having a flat bearing faceinclined relative to the longitudinal axis of the member and disposed at the upper end of the member for engaging the wall of a conduit to overbalance the member at its lower end, and a reciprocating hammer supported solely by the, member; and disposed transversely oi the member and trailing the means, said hammer tapping and sealing the edge of a Pittsburgh seam during movement of the member and after the standing edge of a Pittsburgh seam has been turned by said means.

6. A Pittsburgh lock seam sealer comprising a slide, a die fixed to said slide and having an elongated curved passage for receiving and turning the standing edge oi. a Pittsburgh seam during sliding movement of the slide, said passage including an entrance and an exit, and a reciprocating hammer slidably carried by said slide behind the die and at the exit of said passage and movable relative to the die and transversely of the passage for tapping and sealing the 15 edge of a Pittsburghseam turned by said die.

MARTIN TROOP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 348,558 Henning Sept. '7, 1886 355,108 Small Dec. 28, 1886 1,258,206 Fetcher Mar. 5, 1918 1,816,318 Eksergian July 28, 1931 2,233,937 Hexdall Mar. 4, 1941 2,263,952 Marcorelli Nov. 25, 1941 2,295,131 Scott Sept. 8, 1942 2,414,178 Sprinkle Jan. 14, 1947 FOREIGN PATENTS Number Country Date 524,091 Germany July 6, 1942 

